I believe the closest antonym would be worsen
hope this helps
I believe the answer to this question would be either a metaphor, idiom, or alliteration. But this would most likely be idiom because people can interpret different meanings of this phrase negative or positive and can take it personally or extensively.
Answer:
1. jane hasn't gotten a good voice. she sings badly.
2.this math exercise isnt hard. i can do it easily.
3.look!those small dogs are running very fast. but the big one is slowly
4.the audience sat and listened quietly to the loud music.
5.james is a very kind boy. he always plays nicely with younger children.
hope this makes sense
